【摘要】 根据潍坊酸雨监测站2003~2006年的酸雨监测资料,分析了酸雨的季节变化特征,同时研究了酸性降水与气象条件的关系。统计得出,在186个降水样本中,pH值小于5.6的酸性样本39个,占21.0%,pH值大于等于5.6的样本147个,占79.0%;酸雨在秋季出现频率最高,春季较少;酸雨多出现在夜间,非酸性降水多出现在白天,酸性物质多集中在大气边界层中上部,而碱性物质多漂浮在大气边界层的中下部。分析得出,酸雨的形成与大气的污染物浓度、混合层的高度、风向风速,以及降水量和雾有密切关系。更多还原

【Abstract】 Based on the acid precipitation monitoring data from 2003 to 2006 at Weifang Acid Monitoring Station,analyzed are the seasonal variation characteristics of acid precipitation and the relationship between acid precipitation and meteorological conditions.The statistics show that in 186 precipitation samples,there are 39 acid samples with pH>5.6(21.0%),147 samples with pH≥5.6(79.0%).The occurrence frequency of acid precipitation is the highest in autumn,and lower in spring;the acid precipitation occurs more frequently during the night,and the non-acid precipitation occurs usually in the daytime;the acid substances float at middle and upper levels of the atmospheric boundary layer,and the alkali substances at the middle and lower levels.It is concluded that the occurrence of acid precipitation has close relationship with the density of air pollutants,the height of the atmospheric mixed layer,wind direction and speed,precipitation,and the fog.更多还原